Question

Cost of polishing outer surface area of a cylinder @ rupees 10 per 100 cm square whose surface area outer is 2640 cm square

Answer 1

⋆AˉNSWEˉR⋆​
given cost of polishing outer surface area is rupees 100 cm square
surface area of a cylinder is 2640 CM square
therefore cost is equal to
$2640 \div 100 \times 10$
$= 264$
the total cost of polishing outer surface of a cube is 264 rupees